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Certified Reference Standards...
Chemical Name: 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzoic acid (as per EP)
Synonym: T4-Benzoic Acid (USP) ; Levothyroxine Benzoic Acid Impurity ; Levothyroxine USB H
Smiles: IC1=CC(OC2=C(I)C=C(C(O)=O)C=C2I)=CC(I)=C1O
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